Google is everywere, even where and when you don't expect it to be

Lately, as I was working with a friend on android on a new way to write native app more effectively, I stumbled upon something quite surprising.
We where doing an HTTP request to a server from within the android app, to a non existent URL, in order to catch the default user-agent of the sdk.
As we used a non existent URL for the first time ever there is no way googlebot could be aware of it. Nevertheless, I was surprised to see googlebot coming right after the expected request!